* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon {
    width: 60px;
    height: 60px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-5px);
    }
}

.header-text {
    display: flex;
    flex-direction: column;
    align-items: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
    margin: 0;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
    margin: 0;
}

.controls {
    padding: 20px 40px;
    background: #f8f9fa;
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
    border-bottom: 1px solid #e0e0e0;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.btn-small {
    padding: 6px 12px;
    font-size: 14px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background: #5568d3;
}

.switch {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    cursor: pointer;
}

.switch input {
    display: none;
}

.slider {
    width: 50px;
    height: 26px;
    background: #ccc;
    border-radius: 26px;
    position: relative;
    transition: background 0.3s;
}

.slider:before {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    top: 3px;
    left: 3px;
    transition: transform 0.3s;
}

.switch input:checked + .slider {
    background: #667eea;
}

.switch input:checked + .slider:before {
    transform: translateX(24px);
}

.switch-label {
    font-size: 14px;
    color: #333;
}

.input-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 40px;
}

.input-panel {
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.panel-header h2 {
    font-size: 1.3em;
    color: #333;
}

.json-input {
    width: 100%;
    min-height: 400px;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    resize: vertical;
    transition: border-color 0.3s;
}

.json-input:focus {
    outline: none;
    border-color: #667eea;
}

.error-message {
    margin: 20px 40px;
    padding: 15px;
    background: #fee;
    border-left: 4px solid #f00;
    border-radius: 4px;
    color: #c00;
    font-family: monospace;
}

.diff-section {
    margin: 0 40px 40px;
    border-top: 2px solid #e0e0e0;
    padding-top: 30px;
}

.ad-section {
    margin: 0 40px 20px;
}

.site-footer {
    padding: 16px 40px 24px;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
}

.diff-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.diff-header h2 {
    font-size: 1.5em;
    color: #333;
}

.diff-stats {
    display: flex;
    gap: 15px;
}

.stat {
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
}

.stat.added {
    background: #d4edda;
    color: #155724;
}

.stat.removed {
    background: #f8d7da;
    color: #721c24;
}

.stat.modified {
    background: #fff3cd;
    color: #856404;
}

.diff-viewer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
    height: calc(100vh - 400px);
    min-height: 400px;
    max-height: 800px;
    background: #fff;
}

.diff-panel {
    display: flex;
    flex-direction: column;
    border-right: 1px solid #e0e0e0;
    min-height: 0;
    overflow: hidden;
}

.diff-panel:last-child {
    border-right: none;
}

.diff-panel-header {
    background: #f8f9fa;
    padding: 12px 15px;
    font-weight: 600;
    color: #333;
    border-bottom: 1px solid #e0e0e0;
    font-size: 14px;
    flex-shrink: 0;
}

.diff-content {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.8;
    overflow-y: auto;
    overflow-x: auto;
    background: #fff;
    flex: 1;
    min-height: 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: #ccc transparent;
}

.diff-content::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.diff-content::-webkit-scrollbar-track {
    background: transparent;
}

.diff-content::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

.diff-content::-webkit-scrollbar-thumb:hover {
    background: #999;
}

.diff-line {
    padding: 2px 15px;
    display: flex;
    min-height: 1.8em;
    align-items: center;
    white-space: pre;
    word-break: break-word;
}

.diff-line-number {
    display: inline-block;
    width: 50px;
    color: #999;
    text-align: right;
    padding-right: 15px;
    user-select: none;
    flex-shrink: 0;
}

.diff-line-content {
    flex: 1;
    padding-left: 10px;
    overflow-x: auto;
    word-break: break-word;
}

.diff-line.removed {
    background: #ffcdd2;
}

.diff-line.removed .diff-line-content {
    color: #b71c1c;
    font-weight: 500;
}

.diff-line.added {
    background: #c8e6c9;
}

.diff-line.added .diff-line-content {
    color: #1b5e20;
    font-weight: 500;
}

.diff-line.modified-left {
    background: #ffcdd2;
}

.diff-line.modified-left .diff-line-content {
    color: #b71c1c;
    font-weight: 500;
}

.diff-line.modified-right {
    background: #c8e6c9;
}

.diff-line.modified-right .diff-line-content {
    color: #1b5e20;
    font-weight: 500;
}

.diff-line.unchanged {
    background: #fff;
}

.diff-line.unchanged .diff-line-content {
    color: #333;
}

@media (max-width: 968px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 8px;
    }
    
    header {
        padding: 20px;
    }
    
    .header-content {
        gap: 15px;
    }
    
    .logo-icon {
        width: 50px;
        height: 50px;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .subtitle {
        font-size: 1em;
    }
    
    .controls {
        padding: 15px 20px;
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
    }
    
    .input-section {
        grid-template-columns: 1fr;
        padding: 20px;
        gap: 20px;
    }
    
    .diff-section {
        margin: 0 20px 20px;
        padding-top: 20px;
    }
    
    .diff-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .diff-stats {
        width: 100%;
        justify-content: space-between;
    }
    
    .diff-viewer {
        grid-template-columns: 1fr;
        height: auto;
        max-height: none;
        min-height: auto;
    }
    
    .diff-panel {
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        min-height: 300px;
        max-height: 50vh;
    }
    
    .diff-panel:last-child {
        border-bottom: none;
    }
    
    .error-message {
        margin: 15px 20px;
    }
}

@media (max-width: 480px) {
    .header-content {
        gap: 10px;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    header h1 {
        font-size: 1.5em;
    }
    
    .panel-header h2 {
        font-size: 1.1em;
    }
    
    .diff-header h2 {
        font-size: 1.2em;
    }
    
    .diff-panel-header {
        padding: 10px 12px;
        font-size: 13px;
    }
    
    .diff-content {
        font-size: 12px;
    }
    
    .diff-line-number {
        width: 40px;
        padding-right: 10px;
        font-size: 11px;
    }
}